From 979ae4f9164bdae6db100fa7835b2f432160e7fd Mon Sep 17 00:00:00 2001
From: Simon Willison <swillison@gmail.com>
Date: Sun, 23 Jun 2019 15:23:53 -0700
Subject: [PATCH] Replaced sanic.request.RequestParameters

---
 datasette/utils/__init__.py | 13 +++++++++++++
 datasette/views/table.py    |  5 ++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/datasette/utils/__init__.py b/datasette/utils/__init__.py
index 5ed8dd12..bdebfc30 100644
--- a/datasette/utils/__init__.py
+++ b/datasette/utils/__init__.py
@@ -741,3 +741,16 @@ def format_bytes(bytes):
         return "{} {}".format(int(current), unit)
     else:
         return "{:.1f} {}".format(current, unit)
+
+
+class RequestParameters(dict):
+    def get(self, name, default=None):
+        "Return first value in the list, if available"
+        try:
+            return super().get(name)[0]
+        except KeyError:
+            return default
+
+    def getlist(self, name, default=None):
+        "Return full list"
+        return super().get(name, default)
diff --git a/datasette/views/table.py b/datasette/views/table.py
index 14b8743a..b5765ca4 100644
--- a/datasette/views/table.py
+++ b/datasette/views/table.py
@@ -4,12 +4,12 @@ import json
 
 import jinja2
 from sanic.exceptions import NotFound
-from sanic.request import RequestParameters
 
 from datasette.plugins import pm
 from datasette.utils import (
     CustomRow,
     QueryInterrupted,
+    RequestParameters,
     append_querystring,
     compound_keys_after_sql,
     escape_sqlite,
@@ -219,8 +219,7 @@ class TableView(RowTableShared):
         if is_view:
             order_by = ""
 
-        # We roll our own query_string decoder because by default Sanic
-        # drops anything with an empty value e.g. ?name__exact=
+        # Ensure we don't drop anything with an empty value e.g. ?name__exact=
         args = RequestParameters(
             urllib.parse.parse_qs(request.query_string, keep_blank_values=True)
         )